           package com.java.diagnostics.visualizer.impl.display;
           
           import com.java.diagnostics.visualizer.display.DataDisplayer;
           
           public abstract class DataDisplayerImpl
             implements DataDisplayer
           {
             protected static final String DISPLAY_METHOD = "display";
             protected static final String SAVE_METHOD = "save";
             protected final String className = getClass().getName();
           
             protected String addFileExtension(String baseName, String extension)
             {
               if (baseName.endsWith(extension))
               {
                 return baseName;
               }
               return baseName + extension;
             }
           
             public String[] getFileSaveExtensions()
             {
               return null;
             }
           
             public String getDefaultFileSaveExtension() {
               return null;
             }
           
             public boolean isSaveAsDirectory() {
               return false;
             }
           
             public void copyToClipboard()
             {
             }
           }

